include iostream using namespace std class fraction private long long

#include<iostream>
using namespace std;
class fraction{
private:
    long long int a,b;
public:
    fraction(long long int a = 0, long long int b = 1)
    {
        this->a = a;
        this->b = b;
    }
    void show()
    {
        cout << a << '/' << b;
    }
    void read()
    {
        char c;
        cin >> a >> c >> b;
    }
    fraction operator*(fraction other){
        return fraction(a * other.a, b * other.b);
    }
    fraction operator+(int z){
        return fraction(b * z + a, b * 1);
    }
    fraction operator-(){
        return fraction(-a, b);
    }
    fraction operator/(fraction other){
        return fraction(a *  other.b, b * other.a);
    }
};
int main(){
    fraction x;
   // int z;
    x.read();
 //   cin >> z;
    (-x).show();
    return 0;
}